Refile Attachment Disposition

refile_patch.rb

module Refile
  class << self
    def attachment_url(object, name, *args, prefix: nil, filename: nil, format: nil, host: nil, disposition: nil)
      attacher = object.send(:"#{name}_attacher")
      file = attacher.get
      return unless file

      host ||= Refile.host
      prefix ||= Refile.mount_point
      filename ||= attacher.basename || name.to_s
      format ||= attacher.extension

      backend_name = Refile.backends.key(file.backend)

      filename = Rack::Utils.escape(filename)
      filename << "." << format.to_s if format

      uri = URI(host.to_s)
      uri.path = ::File.join("", *prefix, backend_name, *args.map(&:to_s), file.id.to_s, filename)
      uri.to_s
    end
  end

  class App < Sinatra::Base
    private
      def stream_file(file)
        expires Refile.content_max_age, :public, :must_revalidate

        if file.respond_to?(:path)
          path = file.path
        else
          path = Dir::Tmpname.create(params[:id]) {}
          IO.copy_stream file, path
        end

        filename = request.path.split("/").last

        send_file path, filename: filename, disposition: params.fetch(:disposition, :inline), type: ::File.extname(request.path)
      end
  end
end